i have a few
1. ***** sucks
2. dont let the guy at ***** tell you that an eclipse is a good system
3. yellow tangs belong in big tanks, and if some guy trys to sell you one for your nano, stop going to that fish store
4. if a fish is upside down at the bottom of a tank, dont let the guy at the store tell you that it is normal
5. cleaning crew comes before fish
6. get a real thermometer, not a strip
7. patience is a virtue
8. go on saltwaterfish.com every free moment i have
9. listen to the advice people give you on SWF.com
10. plan before purchasing
well thats it... enjoy